Skin Conditioning

Gelidium Amansii Extract

INCI: GELIDIUM AMANSII EXTRACT

Reviewed by Daisy · Last updated 14 Aug 2026

A red algae extract with potential skin-soothing and conditioning properties

Best For Skin Types

All, Sensitive

Addresses

Redness, Sensitivity, Inflammation

Usage Frequency

Daily

What Is Gelidium Amansii Extract?

Gelidium amansii extract is derived from a red seaweed commonly harvested for agar production. The extract contains cellulose microfibrils and various bioactive compounds that have been studied for their effects on skin health.

In skincare formulations, it functions as a skin conditioning agent. The extract has been investigated for its ability to modulate inflammatory pathways in skin cells, particularly in response to environmental stressors.

How It Works

The extract appears to work through its cellulose microfibril content and bioactive compounds. In laboratory studies, these components have demonstrated the ability to suppress certain inflammatory signalling pathways—specifically those activated by UV exposure—by inhibiting gene expression related to inflammation.

The exact mechanisms in living skin are still being clarified, but the research suggests the extract may help the skin's natural defence systems respond to environmental stress.

Clinical Evidence & References

In vitro and early in vivo research shows promising results. Studies have demonstrated that cellulose nanocrystals and microfibrils derived from Gelidium amansii can suppress inflammatory markers in skin cells without causing toxicity, and may reduce epidermal thickness and inflammatory cytokines in mouse models.

However, human clinical trials remain limited. The existing evidence is largely from controlled laboratory and animal studies, so the extent of these benefits in real-world skincare use remains to be confirmed through larger human studies.

How to Use

Gelidium amansii extract is typically found in serums, moisturisers, and treatment formulations. Use it as part of your regular skincare routine, following the specific product instructions. It can generally be combined with other skincare ingredients, though patch testing is always sensible if you have particularly reactive skin.

Safety & Precautions

The extract has shown no cytotoxicity in laboratory cell studies. It is generally well-tolerated, though individual sensitivities may vary as with any ingredient.

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